C3e-mb-pcb-v4 Apr 2026

Have you received a V4 board yet? Did you hit the silkscreen bug? Let me know in the comments below.

If you’ve been following the recent wave of ultra-low-power, Wi-Fi + BLE combo boards, you’ve likely stumbled upon the designation C3E-MB-PCB-V4 . At first glance, it looks like a typical parts-bin serial number. But after spending a week with this board, it’s clear this isn't just another ESP32-C3 breakout. c3e-mb-pcb-v4

(Deducting points for the GPIO19 label swap and the missing 5V shifter). Have you received a V4 board yet